<template>
  <div>
    <!-- 展示外部图标 -->
    <div v-if="isExternal" :style="styleExternalIcon" class="svg-external-icon svg-icon" :class="className"></div>
    <!-- 展示内部图标 -->
    <svg v-else class="svg-icon" :class="className" aria-hidden="true">
      <use :xlink:href="iconName"/>
    </svg>
  </div>
</template>

<script setup>
import {computed, defineProps} from 'vue'
import {isExternal as Ex} from '@/utils/validate'

const props = defineProps({
  icon: {
    type: String,
    required: true,
  },
  className: {
    type: String,
    default: ''
  }
})


const isExternal = computed(() => Ex(props.icon))

const styleExternalIcon = computed(() => ({
  mask: `url(${props.icon}) no-repeat 50% 50%`,
  '-webkit-mask': `url(${props.icon}) no-repeat 50% 50%`
}))

const iconName = computed(() => `#icon-${props.icon}`)
</script>
<style lang="scss" scope>
.svg-icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.15em;
  fill: currentColor;
  overflow: hidden;
}

.svg-external-icon {
  background-color: currentColor;
  mask-size: cover !important;
  display: inline-block;
}
</style>